noun

menses

MEN-seez/ˈmensiːz/

The flow of blood from the uterus during menstruation.

Her menses are heaviest during the first two days.

A clean respectful medical illustration of the uterus and upper reproductive tract, with a small dark-red area of shedding endometrial lining and a restrained downward flow toward a folded menstrual pad beneath; neutral clinical framing, no external genitalia or erotic context, no labels.

Etymology

The Latin word for “month,” used in the plural as “months,” became a name for the uterine discharge through its recurring monthly timing.

In context

Rhesus Medicine3:35

regularity of the menses the volume may be hard to quantify and therefore may be expressed as having to change pads or tampons at a high frequency such as every hour

Abnormal Uterine Bleeding (AUB) - Menorrhagia & Heavy Menstrual Bleeding | (Including Mnemonic!)

More examples

The medication reduces her unusually heavy menses.
She tracks changes in her menses each month.
The doctor asks whether her menses contain large clots.

Forms

menses

menstrual adjective — Relating to menstruation or menstrual flow.

menstruation noun — The periodic shedding of the uterine lining.

Similar words

menstruation: Names the bodily process rather than specifically the blood flow.
period: Common everyday term for an episode of menstrual bleeding.